Automatic draft-regulator



3 Sheets-Sheet 1. I. P. & P. O. BEERS.

(No Model.)

AUTOMATIC DRAFT REGULATOR. No. 469,462. Patented Feb. 23, 1892.

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2 t e 6 h S .w e e h S 3 S R E E B O u M P .L m d 0 M 0 m AUTOMATICDRAFT REGULATOR.

Patented Feb. 23. 1892 7 IIIIIL A.

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I. F. 86 F. G. BEERS. AUTOMATIC DRAFT REGULATOR.

No. 469,462. Patented Feb. 23, 1892.

W/TNESSES: 1N VB N T 5: 4% mm a Ex Beers K, 4 TX ukafxc Q B 29x5 MM BY ATTORNE Y5 UNITED STATES PATENT @rrrcn.

IRA F. BEERS AND FREDRIO C. BEERS, OF ELMIRA, NEW YORK.

, AUTOMATIC DRAFT-REGULATOR.

SPECIFICATION forming part of Letters Patent No. 469,462, dated February23, 1892.

Application filed July 30,1881. Serial lT o. l0l,l82. (No model.)

To all whom, it may concern.-

Be it known that we, IRA F. BEERS and FREDRIO C. BEERS, of Elmira, inthecounty of Ghemung, in the State of New York, have invented new andusefulv Improvements in Automatic Draft-Regulators, of which thefollowing, taken in connection with the accompanying drawings, is afull, clear, and exact description.

Our invention relates to draft-regulators which are regulated by athermostat and electrical connections, the thermostat operating as aswitch.

Our object is to produce a draft-regulator simple in construction, cheapin cost, effective in operation, and of great durability, in which theoperation of a heat-controlled thermostatic bar and its deflectioneither way by the temperature will cause it to make a circuit, release ascape-trip, and open or close the draft, the draft-chain beingcontrolled by an arm connected to a rotatable shaft, and which isrotated by means of a weighted cord and pulley whenever the trip isreleased, said trip being automatically reset with each half rotation ofthe pulley and its shaft, which rotation also breaks the circuittheretofore made by the thermostat.

Our invention consists in the several novel features of construction andoperation hereinafter described, and which are specifically set forth inthe claims hereunto annexed.

It is constructed as follows, reference being had to the accompanyingdrawings, in which- Figure 1 is a front elevation of the apparatuscomplete. Fig. 2 is a side elevation thereof. Fig. 3 is a detail showingthe scape-wire just tripped and released from the armature of theelectro-magnet. Fig. 4: is a sectional detail showing the mounting ofthe contactfingers and a circuit made through the upper one, the screw,and the main shaft. Fig. 5 is an enlarged detail showing the means foradj usting the play of the armature of the electro-magnets when it isoperated to make the trip of the scape. Fig. 6 is a detail showing amode of mounting of the damper-bars e 6, so that they cannot turn norslip lengthwise. Fig. 7 is an elevation of a furnace with the regulatorset up and connected to the main draft-door and to the check in thepipe. Fig.

8 is a plan of the regulator connected to a valve in a pipe. p

A is the main frame, consisting of the vertical side rails 1, thecrossrails 2, and the anglebar 3, secured to the front by the screw 4.and extending upward, and at its upper end provided with a bearing forthe shaft a, the other bearing being in the upper corner of said frame.A deeply-grooved pulley b is mounted loosely upon this shaft, and c is aratchet-wheel secured upon said shaft, 0 being a spring-pawl engagingwith said ratchet to prevent the pulley from turning backward, and c" isan endless cord fitting over said pulley in said groove, extending downthrough and around the weighted pulley c, which is suspended in thebight of the cord, and 0 is the operating-weight supported by the cordbetween said pulleys.

In the front projection of the shaft to the scape or trip wire (1 ismounted, flattened on one side, as at d, (see Fig. 6,) or otherwiseadapted to receive the end of the set-screw d" and be held thereby, sothat it will not twist or slip lengthwise, said scape projecting anequal distance on each side of the shaft. In the outer ends of the shaftwe adj ustably mount the damper-bars c 6, each provided with an arm e,towhich the chain cis pivotally connected by a screw inserted through alink, the bar 6 being connected to the draftdamper h upon the front ofthe heating apparat'us B and the bar a being connected to thecheck-damper h in the smoke-pipe h, and these bars are adjusted so thatwhen the draft is open and the check is closed the bar 6 will standabove the shaft and the bare below it, both beingin the same verticalplane, as shown in Fig. 1 and 2.

In Fig. 7 we show the draft closed and the check open, so that the bar 6is below and the bar 6 is above the shaft. Electromagnets O are mountedupon but insulated from the lower part of the frame A, one of saidmagnets being connected by wire on to the battery D and the other magnetbeing connected to the shaft a by the wire m, binding-screw 4, andangle-bar 3, which is secured to the frame by said screw at, and whichhas at its upper end a bearing for said shaft a. The magnets areconnected together by a wire m".

The shaft is likewise electrically connected to the frame. From thebattery the wire 01 leads to the thermostatD', being directly connectedto the thermostatic bar 19, which is composed of two pieces of materialof different expansible properties, secured rigidly at one end to abacking and insulated therefrom. Upon said backing we mount and insulatethe studs 19, in which the contact-points r and r are screwed, theirpoints being, respectively, on either side of the free end of thethermostatic bar.

Upon the frame we mount andinsulate the spring contact-fingers s and If,one standing above and the other below the shaft and separate therefrom,as shown in Fig. 4. A wire 8 connects the finger s to the contact-point1", and a wire t connects the fingert to the point r. A screw 10 isadjustably inserted into the shaft, and. as the shaft is rotated itmakes a connection with the fingers alternately. The armature o of theelectro-magnet is pivoted at one end to the frame, and is supported by acoiled spring 21 around the screw 1/ which screw regulates the downwardmovement of the armature when a circuit is closed, and o is an armmounted upon the frame and projecting out and over the armature, andregulates its upward movement. Normally one end of the scape. is inengagement with the free end of the armature, as shown in Fig. 1.

As shown in Fig. 7, the thermostat is mounted upon the wall of a roomand connected to the regulator and battery. \Vhen the temperature isnormal, the regulator will stand in the position shown in Fig. 1, thedraft will be closed, and the check open. Then when it rises abovenormal the free end of the thermostatic bar will be deflected by thedifference in expansion over against the contact-point r and makes acircuit through the wire finger s, screw 10, shaft a, arm 3, wire m, andelectro-magnet, and depresses the armature and releases the scape cl,and then the weight 0 will cause the pulley b to 1'0- tate. When by suchrotation the screw to is disengaged from the finger s, the circuit isbroken and the armature flies up again, so that when the other end ofthe scape comes around it engages with-the armature again at thecompletion of the half-rotation of the pulley. By this samehalf-rotation the arm 6 is lowered and the arm 6 is raised, which closesthe draft and opens the check, reversing the position of these arms, asshown in Fig. 2. This brings the screw w into engagement with the fingert. lVhen the temperature lowersand the thermostatic bar is deflected tothe right and makes a circuit through the contact-point r, then thepulley makes anotherhalf-rotation, closes the check, and opens thedraft. hen the weight 0 is run down, we throw the pawl 0 out ofengagement with the ratchet and then raise the Weight, thus rewinding,and when it is clear up we throw the pawl back into engagement. Then thepawl is out, the pulley is free to rotate upon the shaft for therewinding.

In Fig. 8 we show both chains connected to a rotating damper in a pipe,or only one chain need be used, provided a counterbalanceweight is addedto the outer arm upon the damper-shaft.

hat we claim as our invention, and desire to secure by Letters Patent,is-

1. In a draftregulator, the combination of a shaft rotatabl y supportedin a suitable frame, a pulley mounted thereon, a weighted cord wound onthe pulley, an electro-magnet, an armature, a scape projecting from theshaft and engaging the armature, a battery, a thermostat, vamake-and-break device .operated by the pulley, suitable electricconnections between the battery, electromagnet,

thermostat, and make-and-break device, and oppositelyextending armsmounted upon said shaft and having connection with the dampers to beoperated, all substantially as set forth.

2. In a draft-regulator, the combination of a shaft rotatably supportedin a suitable frame, a pulley mounted thereon, a weighted cord woundupon said pulley, an electro-magnet, an armature, anadjustable scapeprojecting from the shaft and engaging the armature, a battery, athermostat, spring-fingers supported upon the frame adjacent to theshaft, a projecting screw or lug on the shaft and adapted to engage withsaid fingers alternately when the shaft rotates, suitable electricalconnections between the battery, thermostat, springfingers, and electromagnet,

and oppositely-extending adjustable arms mounted on opposite ends .ofthe shaft and connected with the dampers to be operated, substantiallyas set forth.

In witness whereof we have hereunto set our hands this 20th day of July,1891.

IRA F. BEERS. FREDRIG O. BEERS.

In presence of- IRA S. BEERS, M. F. BEERS.

